Antón
started explaining some basic VoIP concepts and then he went through
more advanced ones mainly focused in Kamailio SIP server (slides).Then,
I made a review and a demo of the most common VoIP vector attacks that
we found every day “in the wild” and their available countermeasures (slides).

As the last course, we extended the mandatory practice with an optional exercise (you can download them from the links below):

We
encourage the students to give it a try, I strongly think this practice
could be very useful for their professional future. In fact, Andrés
Souto (@kai670),
who did a great job last year while being a student of the last course,
is working now with us at Quobis. And last, but not least, we would
like to thank Martín for this opportunity of sharing a good time and
discovering skilled students.